Improvement in coal-stoves



2 Sheets-f-Sheet 2.

S. H.`La RUE.

Coal Stoves. l No.\49,487. v y, Patented Apra|7,1s74.

NITE-D STATES PATENT @Fries SILAS H. LAVItUE, OF PHILADELPHIA, PENNSYLVANIA,

IMPROVEMENT IN COAL-stoves.

Specification forming part of Letters Patent No.

149,487, dated April 7, 1874; application iilrd March 10, 1874.

' new and useful Improvement in Coal-Stoves and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings making part of this specification, in Which'- y Figure 1 is a vertical section of the same in theline :o of Fig. 3. Fig. 2 is a similar section in the line y y of Fig. 3. Fig. 3 is a horizontal' section of the same in the line e' z.

The nature of my invention consists, first, ina stationary central imperforated {ire-bed, in combination with a horizontally-vibrating grated fire-bed surface, made with a depressed transverse agitating bar, and with a central passage through it, and .arranged on a plane considerably above the imperforated bed, so as to have a free lateral discharge-passage into the ash-pit. By this combination, the clinkers uponv the surface of the iinpertbrated bed can be forced to one side, and,overthe edge of the imperforated bed, into the ash -pit below, by the simple vibration of the grated surface. Second, in the combination of a suspended firepot, having a grated lower edge, With t-he annular vibrating grated fire-bed surface, andtheystationary imperforated nre-bed, whereby` when thus freed, the clinkers can be dis charged, by a vibration of the grated surface, over the edge of the stationary fire-bed into the ash pit, as will bc presently described. Third, my invention consists in the combina-A tion of a series of doors in the outer Wall of the stove with the suspended re-pot, the annular vibrating grated surface, and the stationary imperforated fire-bed, whereby facilities for readily getting to the interior of the stove at different points of its circumference, for the purpose of poking the re, are afforded. Fourth, it consists in the sweep or agitating bar, for the purpose described; fth, in a combination of a liange or ledge of the base wall ,of the stove with the inclined vibrating gratesurface.

To enable others skilled in the art to make and use my invention, I will proceed to describe it.

A represents the base of a coal-stove. This base is made with a flanged depressed ash-pit,

portion, a, a tapering portion, al, and a slightlyinclined Haring portion, b, and, from the outer edge of the portion b, it takes a slightlyconical form, as shown at c. In the portion al the opening for the ash-drawer is cut, and above this opening a horizontal slot, a2, for the shake-bar of the grated fire-bed, is provided; and in the portion c a series of doors, e, which are closed by mica or other transparent material, is formed. B is the flre-pot, made with a slotted lower edge, d. It is sus pended within the base of the stove by means ofa dan ge, f,on its upper edge, orin any other convenient way. C is the imperforated lirebed, and D the annular grated lire-bed surface. AThe imperforated bed is of much less diameter than the outer diameter of the gratesurface, but a little larger than the central opening C in the ring forming said grated surface. The bed C is formed with a slight flange or iiaring ledge, as at g, and it is suspended firmly in position by means of brackets h h below the grated surface, as shown. A lateral space, 2, is left all round, except Where the brackets h h are applied, for the escape of clinkers and other matters. The grated surface is made of a Haring or inclined surface, it being somewhat in form of an inverted truncated cone, as shown. It is kept in position by means of a horizontal bridge. bar, i, which extends down from its bottom on opposite sides of the central opening, and then rims across the stationary re-bed, bearing close against it, as represented. bridge-bar and the stationary fire-bed are connected by a pivot, j, so that the former, withA the grated surface, can be vibrated horizontally, while the latter remains stationary. The shake-bar 7c is attached to the edge of the grated surface, and passed through the slot a2, in the manner shown.

It will be observed that the bridge-bar in cross-section is of nearly V form, and thus presents bevel surfaces to any objects it may sweep against 0n the stationary'bed when the grated surface is vibrated. rlhis bar acts as a sweep for removing clinkers or any other obstructin g matter which may be upon the sta tionary .tire-bed when the grated surface is vibrated, andthus the stove can be cleaned of its clinkers or matters which clog the draft by a simple vibration of the grated surface. The clinkers and other matters fall over the edges ofthe stationary bed into the ash-pit below.

In some cases it may be necessary to poke the tire within the {ire-pot, and for this purpose I haveprovided slots in the lower part of the ire-pot, and also have provided the doors in the uppermost section of the base of the stove. v

The upper structure 011 the ash-pit may be a single perforated wall with mica or illumination windows; or it ma'y bc a stove of the magazine or base-burning construction.

The walls of the stove may be made with doors or apertures, which are without mica or illuminating material set in them at the points where the poke-holes are provided.

The advantages of having the central stationary iire-bedclosed is this, the bar can be swept` over it more readily, and the ashes and clinkers are caused to close up the lateral clinker-discharge passage during the ordinary burning of the stove, and thereby the draft is compelled to pass up through the grated surface, and thus insure the burning ot' the fuel near the outer as well as the inner edge ofthe grate, and thus a greater and more direct radiation of heat and light through the lower base-section of the stove is secured. The ashes and clinkers banked up on the iire-bed prevent the bed from burning out as rapidly as when cleared of these matters through a grated bottoni. Another advantage of my stove is this, the inclined iiange of the base-section forms a lateral extension to the vibrating grate-surface, and the coals, as they are shaken, will find a support upon this flange, and when the grated surface is quiet they will roll back upon the grate, instead of falling down over the periphery of the grate, as in other plans, into the ash-pit.

I would state that the sweep agitating-bar may be provided with wings or arms to assist it in sweeping oft' the clinkers and ashes.

I do not claim specifically under this patent the fire-pot notched or slotted at the lower end, as this is not new at this date. Nor do I claim under this patent the broad combination of a grate, a lateral clinker-discharging passage, and a {ire-pot, with its lower end slotted or scalloped.

Vhat I claim as new is- 1. The combination of the stationary imperiorated lire-bed, the annular grated surface, and the transverse,agitating-bar, substantially as .and for the purpose described.

2. The imperforated stationary lire-bed, constructed as described, in combination with the vibrating grated surface pivoted upon the stationary hre-bed, the two being applied -together and having a horizontal lateral discharge-passage between them into the ash-pit, substantially in the manner shown and described.

3. rl`he outwardly-extended inclined flan ge b of the specified base-section, in combination with the lire-pot B, the inclined annular grated surface, and the stationary imperforated rebed, substantially in the manner shown and described. Y

4. The combination ot' the suspended iire pot, having its lower edge slotted, with the vibra-ting iiaring inclined grated surface, the impert'orated iire-bed, and the series of pokehole doors in the base-section of the stove, substantially as described.

5. The sweep-bar applied between the tire bed and the grated surface, and attached to the latter and moving with it, substantially in the manner and for the purpose described.

SILAS H. LA RUE. lVitnesses:

J. N. CAMPBELL, JAs. MARTIN, Jr. 

